Torch for melting precious metals



Dec. 19, 1922.

S. W- HOKE. T-ORCH FOR MELTING PRECIOUS METALS.

FILED AUG-M192].

Patented lllcc. it), i922.

SAM W. HOKE, OF PALISADJE, JERSEY.

TOECH BOB MIELTING FRECIQ US METALS.

Application filed August 1, 1921. Serial No. 488,769.

To all whom it may concern:

Be it known that I, SAM W. Home, a citizen of the United States, and a resident of Palisade, Bergen County, and State of New Jersey, have invented certain new and useful Improvements in Torches for Melting Precious M tals, of which the following is a specification.

My improvements relate to the torches, so called, used by jewelers and others for the reduction of gold, platinum, iridium, palladime, and other precious metals, and for fusing silica, and for other purposes where hi gh temperatures and accurate and facile centre are desirable.

The invention consists in the specific construction, arrangement and combination of parts and appurtenances herein described and claimed,distinctive features being the dispensing with a. mixing chamber by the formulating of the nozzle in such manner as to attain an opposed gyratory admixture of the oxygen or compressed air and the inflammable gas, to insure perfect combustion; the means provided for compensating for inequality of expansion of the tubing involved; the meansfor effecting and regulating the relative supplies of the gases used, etc.,all as hereinafter fully set forth.

In the accompanying drawings,

Fig. 1, is a side elevation on a reducer scale, of my improved 'constructirm and arrangement of melting torch, broken away in part medially;

Fig. 2, is a central lougitlulinal sectional elevation of the parts shown in Fig. 1;

Fig. 3, is a front end view, full. size, of my gyral deflector or swirler, before insertion in the nozzle of the torch;

Fig. l, is a section thereof taken upon plane of line l4l, 8;

Fig. 5, .'s an elevation, full size, of the oxygen tube centralizing; collar;

Fig. 6, is a side elevation of my gyral deflector, or swirler;

Fig. 7, is an end view of the nozzle, full size; i

Fig. 8, is a full size transverse section taken upon plane of line.9-9, Fig. 2.

iVhat may be designated as the handlesection 17b, of the torch, considered. as a unitary structure. consists of a cylindrical. tube to the rear end of which is attached the elbow 6, upon which are mounted the control valves, consisting of the oxygen needle-valve n, and the combustible-gas valve 0. The latter is attached, by a screw coupling pipe 0, to the protuberant portion 6, of the said elbow c, and is provided with an externally corrugated nipple 0?, for engagement with rubber tubing by means of which connection is made with a source of supply of the combustible gas to be used. The oxygen needle valve 42, is also connected (indirectly) by means of a screw coupling it, with the elbow c, the said screw coupling a, in this case engaging the threaded protuberant rear end 0, of the oxygen tube 0,

as shown more particularly in Fig. 2, of 7.0 the d 'uwings,the rear nipple n of the needle valve n, being also threaded for engagement with a nozzle and hose pipeleadingr to the oxygen gas supply.

The forward extremity of the handle sec tion it, is provided with. a screw cap it, which forms the basic support for the extension tube a, upon the outer end of which is secured the nozzle-socket-elbow s, the forward portion 8, of which is inclined laterally at a suitable angle as related to the extension tube a, to facilitate the direction of impingement of the flame in accordance with the requirements of thework to be ac complished.

, The said inclined forward portion .9, of the nozzle-socket elbow s, is screw-threaded internally (preferably) for the reception of the correspondingly threaded basic portion of the nozzle-shell 2,. which is :lornued externally with flat wrench-surfaces a, 2*, by means oi? which said nozzle shell may be adjusted as related to. the 'al deflector or swirler (Z, as andfor the purpose hereinafter set forth.

Z), is a reticulated bearing disc positioned in the nozzle socket elbow s, for the purpose of centralizing and supporting the forward portion of the oxygen tube 0, which latter extends through the elbow e, the handle sec tion it, the extension tube a, and the nozzle socket elbow s, to and in part through the nozzle shells, to approximately the outer end of the latter, as shown in Fig. 2. My gyral deflector or swirler (Z, is mounted upon the forward extremity of said oxygen tubeo, and the nozzle shell is made adjustable with relation thereto to vary, regulate, and

all

prescribe the mixing area m, (Fig. 2) between the outer edge 2 of said nozzle shell .2, and the outer face of the swirler o5.

The latterris cylindrical in general con-,

jet orifices. (P. are each bored in the face of the swirler (Z, preferably (although not v necessarily) at an obtuse angle as related to the longitudinal axi thereof, so as to eject the oxygen gas into the mixing area m, aforesaid, at corresponding angle of inclination as related to the common central longitudinal axis of the torch shell 2, and its swirler insert (Z,it being understood of coursethat said concentric series of jet orilices (Z (Z are all inclined atthe same angle progressively around the circle, so as to impart a gyratory motion in the same direction all the oxygen ejected, causing said gas to impinge more or less transversely against the concentric discharge of combustible gas eiiected peripherally around the oxygenspout (Z;

I do not wish however to confine myself strictly tothis inclined arrangement of the oxygen jet apertures Z (F, as the same may be tormel to extend in parallelism with the central longitudinal axis of the nozzle without departing from the spirit and intent of my invention in this respect.

The cylindrical body of the oxygen spout d, is oi less diameter than the internal diameter of the nozzle shell .2, and is centralized therein'by means of a plurality of three or more peripheral spacing ribs (5 shown in the drawings as forming part 01' the spout insert (i, although obviously the equivalent thereof might be formed on the inner surface of the she or consist of separate ribs positioned between the shell and spout (Z, with like result. the object being to centralize the spout (Z, within the shell 2, while creating an annular combustible gasdelivcry area 9, around saidspout cl.

These spacing ribs (Z (Z are preferably (although not necessarily) inclined as, related to the central longitudinal axis of the nozzle,so as to direct and deliver the combustible gas into the mixing space m, at an angle sutlicient to impart to said a tory or swirling motion. 'l i hen the oxygen jet orifices (Z (P, are likewise inclined wit-h relation to the central longitudinal axis of the nozzle as hereinbetore stated, the angle oi"? inclination of said oxygen gas jet orifices :7 is opposite to that of the inclination of. the spacing ribs (2, so that the oxygen is inected into the gyratory ejectment of com:

bustible gas as a cross swirl, thereby insuring an intimate admixture of the gases, and the perfect combustion thereof.

lily new and improved melting torch in operation is essentially a blow pipe adapted to the reduction of metals and other reira tory substances. By constructing the nozzle in such manner that the gases impinge and mix at the outletof the nozzle as herein set forth 1 not only attain perfect combustion but obviate the need of a mixing chamber, and at the same time prevent back the and pressure. In this connection the inlet control valves 0, and a, atl'ord adequate means for regulating and adjusting the relative proportions of gases projected into and through the torch, considered as a unitary structure.

For the purpose of disposing of the torch when not in use the socket elbow s, is formed with a hool; 3*, by which it may be suspend ed. The heat attained in certain uses of the torch is so great to render this necessary in order to promote cooling without danger to extraneous objects. I i

It is to be understood that by the term spout as used in the following claims ll ixiean to designate the ,9; \flil swirler (5, hereinbetore described. Also, that I do not limit myself to the identical. form of parts shown, minor details in the construction of which may be resorted to without deviating from the spirit and intent of my invention in this respect.

{Ewing to the intense heat and by the torch under and incidental to certain conditions of use, the tubing enterin into the construction of the torch is sub- 2; ect to extremes of expansion and contracgene 'ated in tion, and tor this reason, and to compensate for inequality in this respect between the outer tubular casing and the oxygen pipe 0, l bend the portion 01 said oxygen tube 0,

williin the holder tube 17L, laterally the torn. of a. sigmoid :1 shown in l ip' drawings, the curvature thereof co j lug for variations in tension and obviating undue strain between the parts. I

lVhat I claim as my invention and desire to secure by Letters Patent is,

1. A torch of the character designated, formed with a nozzle consisting of an outer shell communicating with the combustible gas supply and a spout positioned therein and connected with the oxygen supply, said spout being formed with a plurality of entralizing peripheral ribs fitting within the nozzle shell and with a plurality of oxygen jet orifices arranged in a concentric circle as related to the longitudinal axis 01" said nozzle, for the purpose described.

2. A torch oi the character designated, formed with a nozzle consisting of an outer shell communi'ating with the combustible gas supply and a spout positioned therein and connected with the oxygen supply, said spout being formed with a plurality of centralizing peripheral ribs fitting within the nozzle shell and with a plurality of oxygen jet orifices arranged in a concentric circle and angularly as related to the central longitudinal axis of said nozzle, for the purpose described.

3. A. torch of the character designated, formed with a nozzle consisting of an outer shell communicating with the combustible gas supply and a spout positioned therein and connected with the oxygen supply, said spout being formed with a plurality of cen tralizing peripheral ribs fitting within the nozzle shell and inclined with relation to the central longitudinal axis thereof, and also with a plurality of oxygen jet orifices arranged in a concentric circle as related to the longitudinal axis of said nozzle, for the purpose described.

4. A torch of the character designated, formed with a nozzle consisting of an outer shell communicating with the combustible gas supply and a spout positioned therein and connected with the oxygen supply, said spout being formed with a plurality of contralizing peripheral ribs fitting within the nozzle shell and inclined with relation to the central longitudinal axis thereof, and also formed with a plurality of oxygen jet orifices arranged in a concentric circle and angular-1y as related to the central longitudinal axis of said nozzle, for the purpose described.

5. A torch of the character designated, formed with a nozzle consisting of an outer shell communicating with the combustible gas supply and a spout positioned therein and connected with the oxygen supply, said spout being formed with a plurality of centralizing peripheral ribs fitting within the nozzle shell and inclined withrelation. to the central longitudinal axis thereof, and also formed with a plurality ol. oxygen jet orificesarranged in a concentric circle and angularly as related to the central longitudinal axis of said nozzle, the inclination of said oxygen jet orifices being opposite in direction to the aforesaid inclined peripheral ribs on said oxygen spout, for the purpose described.

6. A torch of the character designated, formed with a nozzle consisting of an outer shell communicating with the combustible gas supply, and with a spout connected with the oxygen supply and positioned in said shell by means which centralize said spout with relation thereto while admitting of the passage of combustible gas through said shell, said spout being formed with a plurality of oxygen jet orifices arranged in a concentric circle as related to the longitudinal axis oi? the nozzle, for the purpose described.

comprising a nozzle 7. A torch of the character designated, shell communicating with the combustion gas supply, a spout connected with the oxygen supply and positioned in said shell by means which centralize said spent with relation thereto while admitting of the passage 0t combustible gas throu h said shell, a ii is connectin said spout with the oxygen supply and termed in part with a sigmoidal bend to compensate for expansion and contraction, and a tubular handle section surrounding said sigmoidal portion of the oxygen supply pipe, for the purpose, and substantially in the manner set forth.

8. A torch oi": the character designated, formed with a nozzle consisting of an outer shell communicating with the combustible gas supply and a spout positioned therein and connected with the oxygen supply, said spout being formed with a plurality of centralizing peripheral ribs fitting within the nozzle shell and with a plurality of oxygen jet orifices arranged in a concentric circle and angularly as related to the central longitudinal axis of said nozzle, together with means for adjusting the relative positions of said shell and spout, substantially in the manner and for the purpose set forth.

9. A torch of the character designated, formed with a nozzle consisting of an outer shell communicating with the combustible gas supply and a spout positioned therein and connected with the oxygen supply, said spout being formed with a plurality of centralizing peripheral ribs fitting within the nozzle shell and with a plurality of oxygen jet orifices arranged in a concentric circle and angularly as related to the central longitudinal axis of said nozzle, said shell being adjustable with relation to said oxygen spout, substantially in the manner and for the purpose described.

1(). In a torch oi. the character designated, the combination oi a socket elbow communi eating with the combustible gas supply, and screw threaded tor engagement with a nozzle shell, said nozzle shell adjust-ably attached to said socket elbow by screw thread connection therewith, an oxygen pipe fixedly mounted in said socket elbow, and a spout mounted on the end of said oxygen pipe and positioned in said nozzle shell and formed with a plurality or" centralizing peripheral ribs fitting within the said shell and with a plurality of oxygen jet orifices arranged in a concentric circle as related to the central longitudinal axis of the nozzle, substantially in the manner and for the purpose described.

11. In a torch of the character designated, the combination of a socket elbow communicating with the combustible gas supply and screw threaded for engagement with a nozzle shell, said nozzle shell adjustably at- 10 with relation to the central longitudinal axis thereof, and also'with a plurality. of oxygen jet orifices arranged in a concentric circle as related to the longitudinal axis of said nozzle substantially in the manner and for the purpose described.

SAM W. HOKE.

lVitnesses DOROTHY MIATT, Gno. TM. MIATT. 

